JP2009056719A5 - - Google Patents

Claims (6)

A plurality of nozzle heads are arranged in an orthogonal direction orthogonal to the column direction, and a liquid is discharged from the discharge head in both the forward path and the backward path with the orthogonal direction as the main scanning direction, and dots are formed on the target. A liquid ejection device that can be formed,
An optical sensor;
A dot misalignment adjustment pattern that allows the optical sensor to read a positional misalignment between dots formed by ejecting liquid from the nozzle row in the forward path and dots formed by ejecting liquid from the nozzle row in the return path. At least two partial nozzle rows at different positions for each nozzle row so that a pattern formed by one nozzle row and a pattern formed by other nozzle rows do not overlap in one reciprocating main scan. Pattern forming means for forming the target on every at least two nozzle rows by discharging liquid from the nozzle rows;
A liquid comprising: a dot position deviation adjusting unit that reads a dot position deviation adjustment pattern formed on the target by the optical sensor and adjusts a dot position deviation of a corresponding nozzle row based on the read dot position deviation adjustment pattern. Discharge device.   The liquid ejecting apparatus according to claim 1, wherein the pattern forming unit is a unit that forms the dot position deviation adjustment pattern using at least two partial nozzle rows for each of the at least two nozzle rows.   The liquid ejecting apparatus according to claim 2, wherein the at least two partial nozzle rows are defined such that a distance between them is a predetermined distance or more. The dot position deviation adjusting means reads the dot position deviation adjustment pattern for each pattern formed by the optical sensor with the at least two partial nozzle arrays, and adjusts the position deviation for each of the read patterns. adjustment value is set and the set adjustment value of the average value liquid discharge apparatus corresponding claim 2 or 3 wherein the means for setting the adjustment value of the nozzle array on the basis of the for. The liquid ejection device according to any one of claims 1 to 4 ,
The pattern forming unit forms a plurality of block patterns in the main scanning direction as the dot position deviation adjustment pattern, and discharges liquid from the nozzle row at the forward path and discharges the liquid from the nozzle row at the return path. A means for changing the timing difference for each block pattern to form the dot position deviation adjustment pattern,
The dot position deviation adjusting unit is a unit that reads the density of each block pattern by the optical sensor and adjusts the dot position deviation of the corresponding nozzle row. A plurality of nozzle heads are arranged in an orthogonal direction perpendicular to the direction of the array, and a liquid is ejected from the ejection head in both the forward path and the backward path with the orthogonal direction as the main scanning direction, and dots are formed on the target. A method for controlling a liquid ejection apparatus capable of forming
(A) Dot capable of reading a positional deviation between a dot formed by ejecting liquid from the nozzle row in the forward path and a dot formed by ejecting liquid from the nozzle row in the backward path using an optical sensor For the positional deviation adjustment pattern, partial nozzle rows at different positions are used for each nozzle row so that the pattern formed by one nozzle row and the pattern formed by other nozzle rows do not overlap in one reciprocating main scan. Forming at least two nozzle rows on the target by discharging liquid from at least two nozzle rows,
(B) A method for controlling a liquid ejection apparatus that reads a dot position deviation adjustment pattern formed on the target by the optical sensor and adjusts a position deviation of a corresponding nozzle row based on the read dot position deviation adjustment pattern .